<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div{
            font-size: x-large;
        }
        #div1{
            width:100%;
            height: 50px;
            background-color: aqua;
        }
        #div2{
            position: relative;
            width:100%;
            height: 600px;
            background-color: greenyellow;
        }
        .two{
            float: left;
            width: 300px;
            height: 200px;
            margin: 20px;
            background-color: blueviolet;
        }
        .bottom{
            clear: both;
            background-color: pink;
            height: 150px;
            margin: 10px;
        }
        #div2-left{
            float: left;
        }
        #div2-right{
            float: right;
        }
        #right-top{
            position: absolute;
            right: 0px;
            top: 0px;
            width: 100px;
            height: 50px;
            background-color: green;
        }
    </style>
</head>
<body>
<div id="div1">导航栏</div>
<div id="div2">
    <div id="right-top">固定窗口</div>
    <div class="two">
        <div id="div2-left">栏目</div>
        <div id="div2-right">更多</div>
    </div>
    <div class="two">栏目二</div>
    <div class="two">栏目三</div>
    <div class="bottom">底部1</div>
    <div class="bottom">底部2</div>
</div>

</body>
</html>